Entry to "What Are Some of the Properties of a Fluid?"
Plasma!
Plasma is basically like Gas but the plasmas are made out of free electrons and ions. Plasmas are not that common aswell, commonly known plasmas are the Northern Lights. Other good examples of plasmas are florescent light bulbs, stars in the sky, and neon signs. Plasmas are typically created inside these things when a type of gas meets electricity.
Permafrost!
Permafrost is soil below freezing point for longer then 2 years. Most permafrost is located in high altitudes, probably as a result of the low temperatures. Permafrost apparently, according to Wikipedia, covers 24% of the Northern Hemisphere. Many construction sights have been located on Permafrost and due to the heat of the building and pipes, it melted the permafrost and caused the building to sink. It has been calculated that it would take about 1 year to get about 4.4 metres of permafrost, and 350 years to get 79.9 metres into the ground of permafrost.
Liquid Oxygen!
Liquid Oxygen is pale blue and is ''very'' cold. It boils at -183degrees celcius (-297degrees F). Normal air typically has 21% oxygen. But inhilation of air with 80% oxygen causes irritation of the respitory track. And pure oxygen causes pulmidary irritation and edema after 24 hours. Liquid oxygen is extremely harmful when in contact with bare skin, as it can cause severe burns. Also, due to the low temperature of liquid oxygen, it can cause construction materials to become brittle and potentially shatter.
Resources!
http://www.safety.seas.harvard.edu/services/oxygen.html
http://en.wikipedia.org/wiki/Permafrost
http://www.chem4kids.com/files/matter_plasma.html
http://en.wikipedia.org/wiki/Plasma_(physics)
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